package main

import ( // 左符号不能单独占一行，如 { 也是
	"fmt"
)

func main() {
	var age int
	age = 10
	var dt = "20200202" // 字符串必须双引号
	var fmt_str = "age=%d, date=%s"
	var res = fmt.Sprintf(fmt_str, age, dt)
	fmt.Println(res)
}
